OBJECTIVES To evaluate transesterification based dissolution of dimethacrylate and epoxy polymers, the former containing ester groups. Polymer substrates were treated with an adhesive resin (Stick™ Resin) and an organic catalyst-alcohol solution (ethylene glycol and triazabicyclodecene). The surface was chemically and nanomechanically analyzed with Fourier Transform-Infrared (FTIR) spectroscopy, surface profile peak (Rp) and nanohardness and modulus of elasticity. METHODS A total of 100 specimens each of light-cured dimethacrylate polymer and heat-cured diepoxy polymer were prepared. 20 specimens were randomly selected and used as control group (0s). The remaining specimens were randomly divided into 40 each for treatment with an Stick™ resin and ethylene glycol+triazabicyclodecene. Within each group the 40 specimens were randomly subdivided into 20 each for treatment at 5min and 24h, with 10 specimens for FTIR and nanohardness and modulus of elasticity, and the other 10 for SEM and surface Rp analyses. RESULTS Dimethacrylate polymer showed a reduction in the nanohardness and modulus of elasticity, Rp values and SEM also showed significant topographical changes after being treated with either Stick™ resin or ethylene glycol+triazabicyclodecene, whereas epoxy resin substrate did not. FTIR analyses affirmed changes in the intensity of ester groups. SIGNIFICANCE Ester group containing dimethacrylate polymer showed a reduction in NMP within 5min of exposure to the treatment agents with softening by solution ethylene glycol+triazabicyclodecene associated to the reduction of ester groups in the polymer structure by transesterification. Epoxy polymer without ester groups was not affected by surface softening with treatment agents. Adhesive resin caused surface swelling.

中文翻译：

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二甲基丙烯酸酯粘合剂树脂和有机催化剂-醇溶液对热固性二甲基丙烯酸酯聚合物的表面溶解和酯交换反应。

目的评估基于酯交换的二甲基丙烯酸酯和环氧聚合物的溶解，前者含有酯基。用粘合树脂（Stick™树脂）和有机催化剂-醇溶液（乙二醇和三氮杂双环癸烯）处理聚合物基材。使用傅里叶变换红外（FTIR）光谱，表面轮廓峰（Rp）以及纳米硬度和弹性模量对表面进行化学和纳米力学分析。方法共制备了100份光固化的二甲基丙烯酸酯聚合物和热固化的二环氧聚合物样品。随机选取20个标本作为对照组（0s）。将剩余的样品随机分为40个，分别用Stick™树脂和乙二醇+三氮杂双环癸烯进行处理。在每组中，将40个样本随机分为20个样本，分别在5min和24h进行处理，其中10个样本用于FTIR，纳米硬度和弹性模量，另外10个样本用于SEM和表面Rp分析。结果二甲基丙烯酸酯聚合物在用Stick™树脂或乙二醇+三氮杂双环癸烯处理后，纳米硬度和弹性模量降低，Rp值和SEM也显示出明显的形貌变化，而环氧树脂基材则没有。FTIR分析证实了酯基强度的变化。重要性含酯基的二甲基丙烯酸酯聚合物在暴露于处理剂的5分钟内显示出NMP的降低，通过乙二醇+三氮杂双环癸烯溶液的软化作用，与通过酯交换作用降低聚合物结构中的酯基有关。没有酯基的环氧聚合物不受处理剂表面软化的影响。粘性树脂引起表面溶胀。